Roller skate wheel grinder



Oct. 21, 1941. J, p, GLEBA 2,259,883

ROLLER SKATE WHEEL GRINDER Filed NOV. 26, 1940 M WM? UNITED STATE Patented Oct. 21, 1941 PAT-ENT j oFFlkcE ROLLER SKATEXVHEEL GRINDER John P. Gleba, East Hartford, Conn. ApplicationNovember 26, 1940, Serial No. 367,273 5 claims. gol. 51`-1zs This invention relates to machines for grinding and reconditioning the wheels., of roller skates. The object of the invention is to provide a simple, relatively inexpensive, easily manipulated machine into which roller skates can be quickly placed and the wheels, usually made of wood or fiber, ground true after they are worn out of round, or become rough or grooved, or

[the faces of their peripheries have worn out of parallelism with their axes.

Fig. 1 ofthe accompanying drawing shows a side elevation of the machine with parts in vertical section.

Fig. 2 showsan elevation'looking toward the' left-hand end of the machine. Y Fig.` 3 shows a plan view of the left-hand end of the machine.

Fig. 4 shows a longitudinal section of the skate holding end of the machine. I

The machine has a rectangular base I mounted on which is an electric motor 2 with ya grinding wheel 3, having an abrasive radial face, and a dust removing fan 4 attached to the armature of the motor, also a guard and dust collector 5 arranged about the fan and the grinding wheel.

On the base and facing the grinding wheel is a carriage 6 that is slidably mountedon rods I which extend transversely of the base through lugs 8 on the under side of the carriage, the rods I being supported by lugs 9 which extend .up from the base. The carriage is movable on the rods 'I transversely of the base and transversely of the face of the grinding wheel, by means of a lever I which is pivoted to the base and is connected with the carriage by al link II.

` On the carriage is a table I2 that is movable longitudinally of the base'and carriage or toward and from the face of the grinding wheel. on rods I3 nwhich extend through lugs I4 on the under side of the table, the rods I3 being supported by lugs I which project up from the carriage. The table is movable back and forth on the rods I3 by means of a screw I6 that passes through a lug I1 which extends upward from the carriage, and is threaded through a lug I8 which projects downward from the table. This screw is provided with a handle I9 by means of which it may be turned.

On each side of the table at the end adjacent to the face of the grinding wheel are two upright arms which at their upper ends have sockets 2l for receiving the ends of a skate wheel axle 22. The arms are shown as of such length and the sockets are so positioned that the skate wheel axle will be supported with its axis above and aty right angles to the axis of the grinding wheel. Preferably the socket on one side is fixed in its supporting arm, and the socket on the other side is adjustable in and out, being swivelled to the end of a screw 23 that is threaded through its supporting arm and is provided with a hand Wheel 24 by means of which it may be easily turned. g

In using the grinder the adjustable socket is drawn outward allowing the ends of the axle 22 of theskate wheels 25 thatv are'to be ground, to be placed in the sockets and then the adjustable socket is moved inward by turning the hand wheel 24 so that the wheel axle will be held and the skate supportedl at one end by the sockets in a substantially vertical position.V In this position the lower end of the skate plate 26 rests against an upright rib 21 atthe end of the table between the arms 20. With the skate thus retained the table is moved forward by turning the handle I9 until two of the skate wheels engage the face of the rotating grinding wheel, and then by means of the lever IIJ the carriage which supports the table with the skate is moved back and forth transversely so' as to cause the peripheries of those skate wheels to traverse the face of the grinding wheel. When one pair of skate wheels is ground the skate it removed and turned end for end and the other pair of skate wheels is ground. The fan 4, which may be of any common type and turns with the motor shaft, completely removes the dust and particles ground from the skate wheels and causes it to blow out ofl the opening 28 in the wall of vthe guard 5. The act of locating and removing the skate is easy and rapid, the manipulation of the carriage and table is simple, and the worn faces of the skate wheels are quickly restored to good serviceable condition by the cooperative action of the revolutions of the grinding wheel and rotatory and transverse movements of the skate wheels across the rotating grinding wheel.

The invention claimed is:

1. A grinder for conditioning the peripheral surfaces of pairs of roller skate wheels which comprises a base, a motor mounted on the base, a grinding wheel with an abrasive radial face fixed on the motor shaft and rotating in a constant plane, a carriage mounted on the base and movable in a plane transverse thereof and of the abrasive face :of the grinding wheel, a table mounted on the carriage and movable longitudinally of the base and toward and from the abrasive face of the grinding wheel, a pair of arms eX- tending upward from the end of the table that is adjacent to the abrasive face of the grinding wheel, said arms being spaced apart and moving together in the same direction toward and from the plane of the abrasive face of the grinding wheel when the table is moved longitudinally, and means at the upper ends of said arms for receiving and retaining the ends of the wheel axle of a roller skate with the axle extending transversely of the abrading face of the grinding wheel and the peripheries of the wheels on said axle in position to be subjected to the abrasive face of the grinding Wheel.

2. A grinder for conditioning the peripheral surfaces of pairs of roller skate wheels which comprises a base, a motor mounted ongthe base, a grinding wheel with an abrasive radial face fixed on the motor shaft and rotating in a constant plane, a carriage mounted on the base and movable in a plane transverse thereof and of the abrasive 'faceof ,the grindingwheel; a table mounted on the carriage and movable longitudinally -of the base'and toward and fromthe abra- Vsive face of the grinding wheel, a pair of arms extending upward from the end of the table that is adjacent to the abrasive face of the grinding wheel, said-arms being spaced apart and moving together in the same direction ltoward and from the plane of the abrasive face of the grinding wheel when the table is moved longitudinally, andsockets at the upper ends of said arms for receiving and retaining the ends oi the wheel axle of a roller skate with the axle extending transversely of the abrading face -of the grinding Wheel and the peripheriesof the-wheels on said axle in position to be' subjected to the abrasive radial face ofthe grinding wheel; at least one of saidy sockets being adjustable infV line with the wheel axle itis to receive, i j

' "3.1A grinder for' conditioning the peripheral isurfaces `of pairsof roller skate wheels which comprises a base, a motor mounted-'on the base, a grinding'wheel withian abrasive radial face xed on the, motor shaft and' rotating in a con- T, lstant plane, acarriage mounted on'thebase and movable in a plane transverse thereof and of the abrasive face of the grinding wheel, ya `table mounted on the carriage and movable longitudinally of the base a'nd toward and 'iromithelabrasive'face of the grinding wheel, a pair o'f arms ,extending upward from 'the end of the table that is adjacent to the abrasive face of the grinding wheel, said arms being spacedapart and moving' together inV the same direction toward and from the plane of the abrasive face of the grind'- ing wheel when the table is movedV longitudinally,4 means at lthe upper4 ends of said arms for receivingA therendsV of the wheel axle of a roller skate, and Van abutment extending upward from the table between said arms for the engagement of the end of the skate and adapted to hold the skate with the peripheries of the wheels on said axle in position to be subjected to the abrasive radial face of the grinding wheel.

4. A grinder for conditioning the peripheral surfaces of pairs of roller skate wheels which comprises a base, a motor mounted on the base, a grinding wheel with an abrasive radial face iixed on the motor shaft and rotating in a constant p lane, a carriage mounted on the base and movable in a plane transverse thereof and of the abrasive face of the grinding wheel, a lever pivoted to the base and connected to the carriage for moving the carriage, a table mounted on the carriage and movable longitudinally of the base and toward and from the abrasive face of the grinding wheel, threaded means connecting the car- Iiage and the table for moving the carriage, a pair of arms extending upward from the end of thetable that is adjacent to theabrasive face of. the *grindingwheeLsaid arms being spaced apartV and moving together 1in the same direction toward and from the planevof the abrasive face of the grinding wheel when the table is moved longitudinallmand means at the upper ends of said arms for receiving Vand retaining the ends oi the Wheel axle of a roller skate with the axle extending transversely of the abraiding face of the grinding wheel yand the peripheries of the wheels on 'said axle in position to be subjected to the abrasive radial-face of the grinding wheel.

5. A grinder for conditioning the peripheral surfaces of pairs of roller skate wheels which comprises a base, a motor mounted on the base, a grinding Wheel with an abrasive radial face fixed on the motor shaft and rotating in a constant plane, a carriage mounted on the base and movable in a planeV transverse thereof and of the abrasivev face of the grinding wheel, a table mounted on the carriage and movable longitudinally of the base and toward and from the abrasive face of the grinding wheel, a pair of arms extending upward from the end of the table that is adjacent to the abrasive face of the grinding Wheel, said arms being spaced apart and moving together -in the same direction toward and from the plane of the'abrasive facey of the grinding wheel when the table is moved longitudinally, means atthe upper ends of said arms for receiving landetainingl the'ends of the wheel axle'of 'a roller skate withthe axle extending transversely of the abrading face of the grinding wheel and the peripheries of the' wheels on said axle in position to be! subjectedl to the abrasive radial face of then grinding wheel', afan xed to (the motor shaft," and a guardV and dust collector about the grindingwheel and fan. j y f .fOI-11\IP.GrLEBA.Y 

